Tutorial: Clean custom neighbourhoods + townie creation (updated for Seasons)

[aparkin]

I am currently over a year into my clean custom neighbourhood, and it's working fine, no new townies or NPC's added without my say-so.

However! I have just installed University and am having trouble with the spawning of tonnes and tonnes of secret society members. I have nossrespawn hack to limit this, but so far it has created about 20 ss members.

Does anyone know the limit at which the game will decide that it has enough? Is there a limit at all, or will it just keep creating more and more of them?